NT
Tufted Jay Cyanocorax dickeyi



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2020 Near Threatened B1b(ii,iii)
2016 Near Threatened B1ab(ii,iii,v);C2a(i)
2013 Near Threatened B1ab(ii,iii,v);C2a(i)
2012 Near Threatened B1ab(ii,iii,v);C2a(i)
2008 Near Threatened B1a+b(i,ii,iii,v)
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Lower Risk/Near Threatened
1988 Near Threatened
Species attributes

Migratory status not a migrant Forest dependency high
Land-mass type continent
Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 19,300 km2 medium
Number of locations 11-100 -
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 10000-19999 mature individuals medium estimated 2012
Population trend decreasing - suspected 2004-2025
Rate of change over the past 10 years/3 generations (longer of the two periods) 1-9% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 1-19% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 1-9% - - -
Generation length 6.78 years - - -

Population justification: Based on information provided by Lammertink et al. (1996), the the distribution range covers an area of 13,400 km2. It is estimated that 65-90% of the species range is occupied by home ranges (M. Lammertink in litt. 2010), resulting in 8,700-12,000 km2 of occupied habitat. An estimate of 3 km2 per territory is derived from Croisin (1967) by M. Lammertink (in litt. 2010), suggesting that there are 2,900-4,000 groups in total. Each group has two adults and 9.3 individuals (n=7), implying that there are 5,800-8,000 breeding adults within a population of 27,000-37,200 individuals. Based on the supposition that there are more than two mature individuals per group, the population is placed in the band for 10,000-19,999 mature individuals.

Trend justification: Although some populations may be stable, the overall population is suspected to be in slow decline (M. Lammertink in litt. 2010; C. Villar Rodríguez et al. in litt. 2012) owing to the species's susceptibility to forest destruction (Madge and Burn 1993). The rate of decline may accelerate over the next three generations (C. Villar Rodríguez et al. in litt. 2012).


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Mexico extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Mexico Las Bufas
Mexico Río Presidio - Pueblo Nuevo

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry major resident
Forest Subtropical/Tropical Moist Montane major resident
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable resident
Altitude 1350 - 2150 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Future Minority (<50%) Negligible declines No/Negligible Impact: 2
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Species mortality
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Future Minority (<50%) Negligible declines No/Negligible Impact: 2
Stresses
Ecosystem degradation, Ecosystem conversion
Climate change & severe weather Droughts Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Indirect ecosystem effects, Ecosystem degradation

Utilisation
Purpose Scale
Sport hunting/specimen collecting subsistence, national

Recommended citation
BirdLife International (2024) Species factsheet: Tufted Jay Cyanocorax dickeyi. Downloaded from https://datazone.birdlife.org/species/factsheet/tufted-jay-cyanocorax-dickeyi on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/12/2024.